Breaking Free of Outlook
readwriteweb.com
readwriteweb.com
Most of what he says about Gmail never requiring backup, being the same from any PC, having spam filtering, etc, is true with any decent hosted Exchange Server. Mine comes with web access and a Barracuda spam filter, both of which are great.
Gmail does have better search. That's still Outlook's pain point.
On the whole I don't see a migration away from Exchange to Google Apps as a big win; they're both still platforms that lock you into a system that you don't control, but Google goes one step further and mines that data.
I don't mean "Google is Evil!" with that -- this is what their company is about, and it of course makes business sense for them. But for this sort of infrastructure I'd prefer not to rely on them. Hint: nobody seems to love MS, but their business seems to be doing quite well.
The only reason I am not using it today is because I figured it would be a pain to migrate my current calendar, to-dos and address book to it, but Zimbra is the one I'd be using if I was starting from scratch today.